Table 1. Incidence of PONV after unilateral or bilateral THA/TKA.
| Time point | Unilateral (N=319) | Bilateral (N=177) | |||
|---|---|---|---|---|---|
| Nausea (n/%) | Vomiting (n/%) | Nausea (n/%) | Vomiting (n/%) | ||
| 0–6 hours | 47/14.73% | 20/6.27% | 40/22.60%# | 26/14.69%& | |
| 6–24 hours | 46/14.42% | 24/7.52% | 31/17.51%$ | 19/10.73%$ | |
| 24–72 hours | 16/5.02% | 7/2.19% | 11/6.21%$ | 7/3.95%$ | |
| P value | <0.001* | 0.011* | 0.001* | 0.007* | |
*P values are significant among different time points in nausea and vomiting groups. Compared with unilateral surgery, #P=0.0273, &P=0.002, $P>0.05. PONV, postoperative nausea and vomiting; THA, total hip arthroplasty; TKA, total knee arthroplasty.